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Aromatization and isomerization of 1-hexene over alkali-treated HZSM-5 zeolites: Improved reaction stability
Li, Yuning1,2; Liu, Shenglin1; Zhang, Zekai1; Me, Sujuan1; Zhu, Xiangxue1; Xu, Longya1; Xu LY(徐龙伢); Xu LY(徐龙伢)
KeywordHzsm-5 Zeolite Alkali Treatment Aromatization Isomerization 1-hexene
Source PublicationAPPLIED CATALYSIS A-GENERAL
2008-04-01
DOI10.1016/j.apcata.2007.12.026
Volume338Issue:1-2Pages:100-113
Indexed BySCI
SubtypeArticle
Department8
Funding Project804
Contribution Rank1;1
WOS HeadingsScience & Technology ; Physical Sciences ; Life Sciences & Biomedicine
WOS SubjectChemistry, Physical ; Environmental Sciences
WOS Research AreaChemistry ; Environmental Sciences & Ecology
WOS KeywordMODIFIED ZSM-5 CATALYSTS ; MFI ZEOLITES ; SKELETAL ISOMERIZATION ; N-OCTANE ; ACIDITY ; DESILICATION ; DEALUMINATION ; MESOPOROSITY ; ALKANES ; HYDROISOMERIZATION
AbstractThe HZSM-5 zeolites with micro-mesopore hierarchical porosity have been prepared by the post-synthesis of alkali treatment, and tested in the aromatization and isomerization reactions of 1 -hexene in a continuous flow fixed bed. Effects of several variables upon the controlled formation of mesopores have been thoroughly investigated. The results showed that new mesopores could be created and enlarged on ZSM-5 zeolite by increasing the NaOH concentration, temperature and treatment time employed in the alkali treatment, among which the NaOH concentration was the most effective variable in the studied extent. However, excessive high NaOH concentration induced the collapse of zeolite framework, while high temperature and long treatment time induced the backward deposition of amorphous Si onto the zeolite, which would decrease the amount of formed mesopores. When the properly alkali-treated HZSM-5 zeolites were used as catalysts, the reaction activity of 1-hexene was enhanced, and the stabilities of aromatization and isomerization reactions were improved while that of the cracking reaction was deteriorated. These variations of reaction stabilities were associated with the introduction of mesopores over the zeolites, which shortened the diffusion pathlength of the feed/ products and reduced the channel blockage. (c) 2008 Elsevier B.V. All fights reserved.
Language英语
URL查看原文
WOS IDWOS:000254905200015
Citation statistics
Cited Times:89[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://cas-ir.dicp.ac.cn/handle/321008/100083
Collection中国科学院大连化学物理研究所
Corresponding AuthorXu LY(徐龙伢); Xu LY(徐龙伢)
Affiliation1.Chinese Acad Sci, Dalian Inst Chem Phys, Dalian 116023, Peoples R China
2.Chinese Acad Sci, Grad Sch, Beijing 100039, Peoples R China
Recommended Citation
GB/T 7714
Li, Yuning,Liu, Shenglin,Zhang, Zekai,et al. Aromatization and isomerization of 1-hexene over alkali-treated HZSM-5 zeolites: Improved reaction stability[J]. APPLIED CATALYSIS A-GENERAL,2008,338(1-2):100-113.
APA Li, Yuning.,Liu, Shenglin.,Zhang, Zekai.,Me, Sujuan.,Zhu, Xiangxue.,...&徐龙伢.(2008).Aromatization and isomerization of 1-hexene over alkali-treated HZSM-5 zeolites: Improved reaction stability.APPLIED CATALYSIS A-GENERAL,338(1-2),100-113.
MLA Li, Yuning,et al."Aromatization and isomerization of 1-hexene over alkali-treated HZSM-5 zeolites: Improved reaction stability".APPLIED CATALYSIS A-GENERAL 338.1-2(2008):100-113.
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